<html>
    <head>
        
        <script type="text/javascript" src="valyjs.js"></script>

        <script>
            function onStart(){
                valy.executeIfExists({
                    elementId : "TestP",
                    func: function(element){
                        element.innerHTML = valy.about.version;
                    }
                });
            }
        </script>
    </head>
    <body>
        <p id="TestP"></p>
        
        <button onclick="onStart()">Click</button>
    </body>
</html>